2026 SSI OPEN WATER
DIVER FINAL EXAM
QUESTIONS WITH
ANSWERS
Which of the statements concerning sound transmission underwater is incorrect?
-A: Sound will travel farther underwater then in air
-B: Divers find it difficult to locate the direction of a sound producing source
-C: Divers find it easy to talk to each other directly through water
-D: Sound travels four times faster underwater than in air - C
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water
is:
-A: 2 ata
-B:1 ata
-C: 4 ata
-D: 3 ata - A
Assuming a consistent air consumption rate, diving at a pressure of 4 ata will use as
much air as diving at 2 ata. - 2 times
During normal diving activities, divers should never exceed an ascent rate of feet per
minute. - 30
A scuba tank for recreational diving should be filled with:
-A: A mixture of helium and oxygen
-B: Pure, filtered compressed air or Nitrox
-C: A mixture of hydrogen and oxygen
-D: pure oxygen - B
The rate at which the body becomes saturated with nitrogen:
-A: will vary based on factors, such as depth and blood supply to a particular area of the
body
-B: is always the same rate
-C: is slower at the beginning of the process and faster at the end of the process
-D: is faster t the beginning of the process and slower at the end of the process - A
Haldanes theory that the human body can withstand a 2:1 pressure difference was revised
by D Workman to a nitrogen ratio of:
1
, -A: 3:1
-B: 1:1
-C: 5:1
-D: 1.58:1 - D
The condition in which certain colors are diminished as depth increases is called:
-A: Refraction
-B: Turbidity
-C: Diffusion
-D: Absorption - D
Earplugs:
-A: Aid equalization of the middle of the ear
-B: Protect against cold
-C: Should never be worn while diving
-D: Protect ears from squeeze - C
Gauge pressure is defined as:
-A: Hydrostatic pressure minus 1 ata
-B: The pressure at the surface
-C: The depth reading on a gauge
-D: Absolute pressure minus 1 ata - D
Sinus squeeze can be prevented by:
-A: Valsalva technique
-B: Wearing earplugs
-C: Tilting the divers head back and forth
-D: Not diving with a cold - D
2
DIVER FINAL EXAM
QUESTIONS WITH
ANSWERS
Which of the statements concerning sound transmission underwater is incorrect?
-A: Sound will travel farther underwater then in air
-B: Divers find it difficult to locate the direction of a sound producing source
-C: Divers find it easy to talk to each other directly through water
-D: Sound travels four times faster underwater than in air - C
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water
is:
-A: 2 ata
-B:1 ata
-C: 4 ata
-D: 3 ata - A
Assuming a consistent air consumption rate, diving at a pressure of 4 ata will use as
much air as diving at 2 ata. - 2 times
During normal diving activities, divers should never exceed an ascent rate of feet per
minute. - 30
A scuba tank for recreational diving should be filled with:
-A: A mixture of helium and oxygen
-B: Pure, filtered compressed air or Nitrox
-C: A mixture of hydrogen and oxygen
-D: pure oxygen - B
The rate at which the body becomes saturated with nitrogen:
-A: will vary based on factors, such as depth and blood supply to a particular area of the
body
-B: is always the same rate
-C: is slower at the beginning of the process and faster at the end of the process
-D: is faster t the beginning of the process and slower at the end of the process - A
Haldanes theory that the human body can withstand a 2:1 pressure difference was revised
by D Workman to a nitrogen ratio of:
1
, -A: 3:1
-B: 1:1
-C: 5:1
-D: 1.58:1 - D
The condition in which certain colors are diminished as depth increases is called:
-A: Refraction
-B: Turbidity
-C: Diffusion
-D: Absorption - D
Earplugs:
-A: Aid equalization of the middle of the ear
-B: Protect against cold
-C: Should never be worn while diving
-D: Protect ears from squeeze - C
Gauge pressure is defined as:
-A: Hydrostatic pressure minus 1 ata
-B: The pressure at the surface
-C: The depth reading on a gauge
-D: Absolute pressure minus 1 ata - D
Sinus squeeze can be prevented by:
-A: Valsalva technique
-B: Wearing earplugs
-C: Tilting the divers head back and forth
-D: Not diving with a cold - D
2
